Hi, If the incoming data, rain_mm, is cumulative then you want the WeeWX field rain and the option contains_total = true. This will convert the cumulative value into an increment value that WeeWX expects. rich
On Wednesday, 13 January 2021 at 06:53:11 UTC-5 [email protected] wrote: > Hi Tom! > > Tks for your answer. > > Makes sense that the lack of a clock would imply something else. But, what >> is it? Take a measured amount of water and pour it into the rain bucket. >> What do you see in the captured data? > > Well, I think the value is cummulative, but not for the last 24h, it's > forever (until reboots). At least it's what I'm seeing now. I'm monitoring > my MQTT and about 23h the sensor was reporting 2.1. Rain stopped (until > now, 08h35) and the sensor is still reporting 2.1 . I'll wait until 23h to > see if it will 'zero' the value after 24h. The station doesn't have a > clock, but it can 'count'....so reset after X hours is possible even > without a clock. > > Perhaps you have a unit conversion problem? The packet can use US, METRIC, >> or METRICWX unit systems (see the Appendix *Units* in the Customizing >> Guide for definitions), but whichever one you choose, all the data in the >> packet must conform to the chosen system. > > My sensor reports in mm, and I think it's correct.....the sensor name > irself is called 'rain_mm'. Since I'm using MQTTSubscribeDriver driver, I > have this set in driver section: > [[topics]] > unit_system = METRIC > use_topic_as_fieldname = true > use_server_datetime = True > > Them, my StdReports are set for METRIC too: > [[Defaults]] > [[[Units]]] > # The following section sets what unit to use for each unit > group. > # NB: The unit is always in the singular. I.e., > 'mile_per_hour', > # NOT 'miles_per_hour' > [[[[Groups]]]] > group_altitude = meter # Options are 'foot' or 'meter' > group_degree_day = degree_C_day # Options are > 'degree_F_day' or 'degree_C_day' > group_distance = km # Options are 'mile' or 'km' > group_pressure = mbar # Options are 'inHg', 'mmHg', > 'mbar', 'hPa', or 'kPa' > group_rain = mm # Options are 'inch', 'cm', or 'mm' > group_rainrate = mm_per_hour # Options are > 'inch_per_hour', 'cm_per_hour', or 'mm_per_hour' > group_speed = km_per_hour # Options are > 'mile_per_hour', 'km_per_hour', 'knot', or 'meter_per_second' > group_speed2 = km_per_hour2 # Options are > 'mile_per_hour2', 'km_per_hour2', 'knot2', or 'meter_per_second2' > group_temperature = degree_C # O > > > And in the StdConvert section, I left as 'US'. Should I change it to > METRIC too?? It's a brand new database, not merging new/old data. > > > You definitely do not want to set rainRate. It is typically a derived >> value, calculated by weewx from the stream of loop data. A few weather >> stations can calculate it themselves, but I'd be surprised if yours is one >> of them. > > Maybe this is my mistake. I'm using rainRate for my rain_mm value. But > when I tried just 'rain', the values went totally crazy. I mean, 0.6 in > sensor was displaying about 88mm rainRate and 36mm total rain. There is an > option in the driver called 'contains_total'. I'm almost sure that my > sensor reports only totals (see my last answer in this e-mail), but I'll > make sure after 23h today. If this is the case, in which field should I use > this driver option, 'rain' or 'rainRate'? > This is the description of this option: > contains_total: > Set to *true* if the incoming data is cumulative value (for example, rain > total) and the WeeWX field expects an increment value.. The default is > false > > > > Finally, unless you have other reasons for wanting to use MQTT as an >> intermediary, there is a rtl-433 driver >> <https://github.com/matthewwall/weewx-sdr> available for WeeWX. You >> could simplify your system by going directly from sensor to database by >> using it. > > Well, here is why I'm not using rtl-433 driver directly: > 1) I'm running Weewx on my server (inside my house) > 2) Signal from the station could not get into my server if my dongle was > plugged there. > 3) I already have some raspberry pi's outside for other functions. I just > added a dongle to one rpi and started sending data to my MQTT server. > 4) I plan to include more sensor data from other sensors in the same MQTT > broker. Using this driver it's easier to merge all these sensors. > 4) I use all these MQTT data for my Home Assistant application too. > > > > Em ter., 12 de jan. de 2021 às 21:48, Tom Keffer <[email protected]> > escreveu: > >> Things to think about: >> >> Makes sense that the lack of a clock would imply something else. But, >> what is it? Take a measured amount of water and pour it into the rain >> bucket. What do you see in the captured data? >> >> Perhaps you have a unit conversion problem? The packet can use US, >> METRIC, or METRICWX unit systems (see the Appendix *Units* in the >> Customizing Guide for definitions), but whichever one you choose, all the >> data in the packet must conform to the chosen system. >> >> You definitely do not want to set rainRate. It is typically a derived >> value, calculated by weewx from the stream of loop data. A few weather >> stations can calculate it themselves, but I'd be surprised if yours is one >> of them. >> >> Finally, unless you have other reasons for wanting to use MQTT as an >> intermediary, there is a rtl-433 driver >> <https://github.com/matthewwall/weewx-sdr> available for WeeWX. You >> could simplify your system by going directly from sensor to database by >> using it. >> >> >> On Tue, Jan 12, 2021 at 3:03 PM [email protected] <[email protected]> >> wrote: >> >>> I don't think its based on daily rain. Why? Because it's a very simple >>> station and i'm pretty sure it doesn't have internal clock. I don't have >>> any way to set the clock in station....so how would it calculate midnight?! >>> >>> This is my 'station': Spare part for weather station (Transmitter / >>> thermo hygro sensor) 433Mhz, with solar panel|Temperature Instruments| - >>> AliExpress >>> <https://www.aliexpress.com/item/32872784585.html?spm=a2g0s.9042311.0.0.27424c4dhJeTs7> >>> >>> I have a rain bucket attached to it. >>> To get data, I'm using rtl_433 to 'capture' the wireless data, generate >>> a JSON and send to my MQTT server. In Weewx, i'm using WeeWX-MQTTSubscribe >>> to get the data from MQTT server. >>> Everything is working fine now, except for the rain, which still twice >>> the reported value. >>> >>> >>> Em terça-feira, 12 de janeiro de 2021 às 19:41:32 UTC-3, >>> [email protected] escreveu: >>> >>>> There is no master list of all the database variables. >>>> >>>> However, there are some comments about rain in the section *Porting to >>>> new hardware* <http://www.weewx.com/docs/customizing.htm#porting> of >>>> the Customizing Guide. In particular, the field 'rain' should be the >>>> amount >>>> of rain that fell *during the period*. That is, if it's LOOP packets, >>>> it's the amount of rain that fell since the last LOOP packet, *not*, >>>> for example, the amount of rain for the day. >>>> >>>> I suspect your field rain_mm is the amount of rain that has fallen >>>> since midnight. As explained in the porting guide, you'll have to take >>>> deltas of that field to get the field rain. >>>> >>>> So, to answer your questions: >>>> >>>> rain_mm => If this is rain since midnight, it should be mapped to >>>> dayRain, which is not in the standard database schema, but is used by some >>>> uploaders. >>>> temperature_C => outTemp. Correct. >>>> humidity => outHumidity. Correct. >>>> >>>> wind_avg_km_h => There is no field for averages. It's calculated by >>>> WeeWX when needed. >>>> wind_max_km_h => Field windGust >>>> wind_dir_deg => Field windDir >>>> >>>> Please read the porting guide. Make sure your driver emits packets >>>> using a consistent unit system. The unit system used by the database >>>> doesn't matter. Incoming data will be converted automatically. >>>> >>>> -tk >>>> >>>> >>>> >>>> On Tue, Jan 12, 2021 at 2:11 PM [email protected] <[email protected]> >>>> wrote: >>>> >>>>> >>>>> Also, a second question: >>>>> >>>>> My station is reporting "0.6" in "rain_mm" field. It's a very light >>>>> rain now. I'm not sure if this is for the last hour or last 15 minutes. >>>>> The thing is that database is clean and in report generate, this is >>>>> what i'm getting for rain: >>>>> >>>>> Rain Rate 88.8 mm/h >>>>> Rain Today 36.0 mm >>>>> >>>>> >>>>> What am I missing? >>>>> >>>>> My units are set (globally in weewx.config) to METRIC. >>>>> >>>>> Em terça-feira, 12 de janeiro de 2021 às 18:50:23 UTC-3, >>>>> [email protected] escreveu: >>>>> >>>>>> Is there any list of fields and what it means in docs? >>>>>> >>>>>> I have some fields in my station but I'm not sure which field should >>>>>> be mapped to which field in DB. >>>>>> >>>>>> rain_mm => Currently mapped to 'rain' >>>>>> temperature_C => outTemp >>>>>> humidity => outHumidity >>>>>> >>>>>> wind_avg_km_h => not mapped, I'm not sure which is the correct field >>>>>> in DB >>>>>> wind_max_km_h => not mapped, I'm not sure which is the correct field >>>>>> in DB >>>>>> wind_dir_deg => not mapped, I'm not sure which is the correct field >>>>>> in DB >>>>>> >>>>>> >>>>>> I'm not an expert, so I don't have idea if I should use wind_avg_km_h >>>>>> for windSpeed, for example. >>>>>> >>>>>> I'm sorry if it's a dumb question. >>>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "weewx-user" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/weewx-user/ad3fe2f1-b6a6-4fc3-a2ce-23389815d8a0n%40googlegroups.com >>>>> >>>>> <https://groups.google.com/d/msgid/weewx-user/ad3fe2f1-b6a6-4fc3-a2ce-23389815d8a0n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "weewx-user" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/weewx-user/0c40c0f0-9894-4794-a4b4-8e2e0e3d9fban%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/weewx-user/0c40c0f0-9894-4794-a4b4-8e2e0e3d9fban%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> > You received this message because you are subscribed to a topic in the >> Google Groups "weewx-user" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/weewx-user/ZMR4MWVakJk/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-user/CAPq0zEB%3D0a4LUzY9c%2Boav9mVcXLCN_L9kr2GzpWntBY6MsziSg%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/weewx-user/CAPq0zEB%3D0a4LUzY9c%2Boav9mVcXLCN_L9kr2GzpWntBY6MsziSg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. 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